Dir

::mktmpdir creates a temporary directory.

The directory is created with 0700 permission.

The prefix and suffix of the name of the directory is specified by the optional first argument, prefix_suffix.

• If it is not specified or nil, “d” is used as the prefix and no suffix is used.

• If it is a string, it is used as the prefix and no suffix is used.

• If it is an array, first element is used as the prefix and second element is used as a suffix.

Dir.mktmpdir {|dir| dir is ".../d..." }
Dir.mktmpdir("foo") {|dir| dir is ".../foo..." }
Dir.mktmpdir(["foo", "bar"]) {|dir| dir is ".../foo...bar" }

The directory is created under ::tmpdir or the optional second argument tmpdir if non-nil value is given.

Dir.mktmpdir {|dir| dir is "#{Dir.tmpdir}/d..." }
Dir.mktmpdir(nil, "/var/tmp") {|dir| dir is "/var/tmp/d..." }

If a block is given, it is yielded with the path of the directory. The directory and its contents are removed using FileUtils.remove_entry_secure before ::mktmpdir returns. The value of the block is returned.

Dir.mktmpdir {|dir|
  # use the directory...
  open("#{dir}/foo", "w") { ... }
}

If a block is not given, The path of the directory is returned. In this case, ::mktmpdir doesn’t remove the directory.

dir = Dir.mktmpdir
begin
  # use the directory...
  open("#{dir}/foo", "w") { ... }
ensure
  # remove the directory.
  FileUtils.remove_entry_secure dir
end

 
               # File tmpdir.rb, line 100
def Dir.mktmpdir(prefix_suffix=nil, tmpdir=nil)
  case prefix_suffix
  when nil
    prefix = "d"
    suffix = ""
  when String
    prefix = prefix_suffix
    suffix = ""
  when Array
    prefix = prefix_suffix[0]
    suffix = prefix_suffix[1]
  else
    raise ArgumentError, "unexpected prefix_suffix: #{prefix_suffix.inspect}"
  end
  tmpdir ||= Dir.tmpdir
  t = Time.now.strftime("%Y%m%d")
  n = nil
  begin
    path = "#{tmpdir}/#{prefix}#{t}-#{$$}-#{rand(0x100000000).to_s(36)}"
    path << "-#{n}" if n
    path << suffix
    Dir.mkdir(path, 0700)
  rescue Errno::EEXIST
    n ||= 0
    n += 1
    retry
  end

  if block_given?
    begin
      yield path
    ensure
      FileUtils.remove_entry_secure path
    end
  else
    path
  end
end
            

Returns the operating system’s temporary file path.

 
               # File tmpdir.rb, line 40
def Dir::tmpdir
  tmp = '.'
  if $SAFE > 0
    tmp = @@systmpdir
  else
    for dir in [ENV['TMPDIR'], ENV['TMP'], ENV['TEMP'],
                ENV['USERPROFILE'], @@systmpdir, '/tmp']
      if dir and File.directory?(dir) and File.writable?(dir)
        tmp = dir
        break
      end
    end
    File.expand_path(tmp)
  end
end